X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=m4%2Fwarnings.m4;h=ca9bf5e9deaea43832c0fc1bd636599b51a8801c;hb=2b4912f774e30251dd1e5affb5e41b7e4e0cdd82;hp=634b183a735db904eb0b39b0decc05078087e38e;hpb=a04dcbf35b56a6ceaaec45351182ac4e05c6b8ea;p=pspp

diff --git a/m4/warnings.m4 b/m4/warnings.m4
index 634b183a73..ca9bf5e9de 100644
--- a/m4/warnings.m4
+++ b/m4/warnings.m4
@@ -9,8 +9,8 @@ dnl From Simon Josefsson
 # gl_WARN_INIT
 # Initializes WARN_CFLAGS variable.
 AC_DEFUN([gl_WARN_INIT],
-[
-  AC_ARG_VAR(WARN_CFLAGS, [C compiler warning flags])
+[AC_SUBST([WARN_CFLAGS])dnl
+AC_ARG_VAR([WARN_CFLAGS], [C compiler warning flags])
 ])
 
 # gl_AS_VAR_IF(VAR, VALUE, [IF-MATCH], [IF-NOT-MATCH])
@@ -47,4 +47,5 @@ AS_VAR_PUSHDEF([gl_Flags], m4_if([$2], [], [[WARN_CFLAGS]], [[$2]]))dnl
 gl_AS_VAR_IF([gl_Warn], [yes], [gl_AS_VAR_APPEND([gl_Flags], [" $1"])])
 AS_VAR_POPDEF([gl_Flags])dnl
 AS_VAR_POPDEF([gl_Warn])dnl
+AS_LITERAL_IF([$2], [AC_SUBST([$2])], [])dnl
 ])